Excavating dipper



March25, 1930.' w. E. MILEY EXCAVA'IING DIPPER Original Filed Feb. 21, 1927 Patented Mar. 25,1930

- 'V'UNITEID STATES PATENT. OFFICE.

WALTER E. MILEY, OF MARION, OHIO, AS SIGNOR TO THE MARION STEAM SHOVEL COM- v..IPANY, OF MARION, OHIO, A CORPORATION OF OHIO Original application filed February 21, 1927, Serial No. 169,786. Divided and this application filed September 7, 1927.

" This invention relates to excavating dippers such as are commonly employed in connection with power operated shovels, and

' relates more particularly to the construction" of the dipper front and the manner of mountingthe teeth thereon.

One object of'the invention is to provide a dipper in which the inner surface of the dipper front will be free from obstructions,

which would interfere with the free movement of material through the dipper.

A further ob'ect of the invention is to provide a dipper ront ofsuch a character that the dipper teeth when mounted thereon will be so arranged with relation to the front that they will provide ample clearance for the latch plate at the lower edge of the front.

Other objects of the invention will appear as the device is described in detail.

side elevation, partly in section, of a dipper embodying my invention Fig. 2 is an elevation of the inner, side of the dipper; Fig. 3 is a section taken on the line 3-3 of Fig. 2; Fig. 4 is an elevation of the inner surface of a portion of a dipper front embodying a slightly modified form'of the invention; and Fig. 5 is a section taken on the line 5-5 of Fig. 4.-

The .present application is a division of the application filed by me February 21, 1927, Serial No. 169,786 for patent on Excavating dippers. In the drawings I have illustrated one embodiment of my invention, with a slight modification thereof, but it will be understood thatthis embodiment has been chosen for thepurposes of illustration only and that the invention may take various,

thereof. 7 V

, As here shown, the dipper comprises a front 1 which'is slightly curved in shape and is provided with rearwardly extending side In the accompanying drawings Fig. 1 is a pack between the teeth. In order to forms without departing from the spirit several parts of the dipper being rigidly Serial No. 218,061.

connected one to the other by rivets. or the like. The lower or discharge end of the dipper is provided with a door 29 which, as here shown, is carried by arms 30 which are curved upwardly and reafwardly and pivotally mounted on lugs 31 carried by the back 4. The back is also provided with other lugs 32 by means of which the dipper is connected 'with the dipper arm or handle. A latch bar 33' carried by the door 29 cooperates with a latch plate 35 secured to the to receive the upper or cutting edge of the dipper front and the inner portion 22 of each tooth extends into' thedipper andthe outer portion 23 thereof extends downwardly along the outer surface of. thefront. In the ordinary construction the inner portions 22 of the teeth rest upon the inner surface of the distance as to provide substantial obstrucfront and therefore project inwardly such a 4 tions to the passage of material through the dipper, these obstructions being particularly ob ectionable when the dipper is working 1n material which has a tendency to wedge or rovide the dipper front with a substantlally smooth inner surface, free from obstructions, I have providedgthe inner surface of the front w1th recesses adapted to receive the inner portions of'the teeth and of such a depth that the-inner surfaces of the teeth will be substantiall flush with the inner surface of the front. referably'the upper portion of the dipper front is offset, as shown at 24, to provide the inner surface thereof with a recess 25'extending across-the upper end thereof, the upper'portion of the outer surface of the front, being offset, projects beyond the lower portion of that surface. As

here shown, the cutting edge of the front faces are in substantially the same notches-the inner portions 22 thereof extend into the-recess 'which is of a depth approximately equal to the thickness of the portions 22 of the teeth so that the inner surfaces of these teeth will lie in substantiallythe same.

10 plane with the inner surface of the front. The spaces between the inner portions 22 of the dipper teethare prefera ly closed by fillers which fit snugly between the teeth andareof such thickness that their inner surplane with the inner surfaces of the, teeth and of the front and the forward portions of the fillers are beveled toward the cutting edge of the front. These fillers divide the oflset por- 2'0 tion of the front into a series of recesses which are arranged in line with and mer e into the respective notches and in which t e ortions 22 of the teeth fit. The fillers may e of any suitable character and in Figs. 2 25 and 3 they are shown at 26 as formed separate from the front and rigidly secured thereto by rivets 27. In Figs. 4 and 5 the fillers are shown at .28, as formed integral with the dipper front. .In this latter instance the 1:0 fillers are of the same general shape and arrangement as those shown in Figs. 2 and 3 but instead of being separately formed and subsequently attached to the front they are cast in one piece with the front thus proaaviding the front with a series of recesses as above set forth, Y

Because of the offset position of the upper portions of the front the outer portions 23 of the teeth, which extend across the offset por- 40 tion of the front and downwardly alongthe outer surface of the front, are caused to can tend a reater distance from the front than they otherwise would do and thus provide, in the bank in which the dipper is working, a deeper path or increased clearance for the latch plate at the lower end of the front, thereby reducing the wear on the latch plate by preventing its engagement with the bank in. which the dipper is working, which it so usually has when the teeth are mounted in th ordinary manner. While I have shown and described one embodiment of my invention I wish it to be un-.'

derstood that I do not desire to be limited to.

53 the details thereof as various: modifications I may occur to a person skilled in the art.

Having now fully described my invention,

whatI claim as new and desire to secure by Letters Patent, is:

1. In an exc'a'vating dipper, afront having recesses in the inner surface andat the upper edge thereof, each adapted to receive a portion of a dipper tooth, said inner surface ex,-

tending in a substantially strai ht line from the lower edge of each recess to e lower por.

hereto.

tion of said front, each recess having its bottom offset outwardly from and substantially parallelwith the inner surface of said front and being of a depth substantially equal to the thickness of said portion, of said tooth, and said fronthaving parts between adjacent recesses'substantially flush with said inner surface and said inner portions of said tooth. i

2. In an excavating dipper, a front having its upper portion offset outwardly to project beyond the plane of the outer surface of said front and to form a recess in the inner surface of said front, and a dippertooth secured to the upper edge of said front and having a part extending into said recess, said part being of a thickness substantially equal to the depth of said recess, said tooth also havingan outer portion extending across the offset portion of said front and downwardly along the outer surface of said front to a point a substantial distance below said offset portion.

3. In an excavatingdipper, a front having a smooth inner surface provided at its upper edge with a transverse recess, dipper teeth secured to said front and each having a part extending into said recess and of a thickness substantially equal to the depth of said recess, and fillers formed separate from said front and rigidly secured thereto between adjacent teeth and having their inner surfaces substan- 1 tially in the plane of the inner surface of said teeth and said front.

4. In an excavating dipper, a front having its upper portion offset outwardly to form [a transverse recess in the inner face thereof and having a straight smooth inner surface extending from said recess to the lower portion of said front, dipper teeth secured to the upper edge of said front and each having a ranged in said recess between adjacent teeth and rigidly secured to said front, said parts of said teeth and said fillers being of such thickness that their inner surfaces will. lie substantially in the plane of the inner surfaces of said front.

In testimony whereof, I afiix my signature WALTER E. MILEY.

' part extending into said recess, and'fillers ar- 

